JPH11200432A - Lock device for cover part for iron casing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent jumping-up by fitting an iron cover of a buried structure in the peripheral locking projection part to recessed holes of the receiving frame part, rotating a swinging member of a locking means by gravity, and engaging the lower end projection part with the receiving frame under surface. SOLUTION: The opposite side is separably locked by a locking means 10 by connecting an iron cover 8 of a buried structure by a hinge to the receiving frame part 7 on the upper end of an upper main body 4. The locking projection part 24 is formed on the outer peripheral surface of the iron cover 8 by forming plural recessed holes 22 in the iron cover fitting surface 21 of the receiving frame part 7. When the iron cover 8 is closed by fitting the locking projection part 24 to the recessed holes 22, a swinging member 19 of the locking means 10 rotates with a fulcrum 18 as the center by gravity, so that the lower end projection part 20 is automatically locked by engaging with the inside diameter peripheral part under surface of the receiving frame part 7. Jumping-up of the iron cover 8 by passing of a heavy vehicle and looseness by irregular abrasion can be prevented by fitting of the recessed holes 22 and the locking projection part 24 and locking of the locking means 10. A lock is opened by releasing locking of the lower projection 20 by pressing the upper surface of the swinging member 19 by inserting a tool from an opening 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for a cover for an iron housing, which locks an iron cover into a receiving frame provided at an upper end of a structure buried underground.

[0002]

2. Description of the Related Art In particular, laying pipes for supplying water, gas, electricity or the like are buried underground in an urban area or a suburb thereof. Control valves such as water control valves, connectors, breakers, etc. are appropriately connected to these laying pipes, and these can be operated from the road surface, maintained and inspected, and these are protected and the installation locations are clearly specified. There is a need to. For that purpose, a hollow iron case (buried sill) is installed underground. Note that a similar iron case may be provided even in a manhole.

[0003] As an iron casing of this type, for example, a storage space for a control valve or the like is supported inside a bottom seat buried at a depth position near an underground facility such as a control valve (water control valve or the like). A hollow cylindrical lower main body to be formed and a hollow cylindrical upper main body connected to the upper side of the lower main body are buried, and a receiving frame portion is provided at an upper end of the upper main body, that is, at a portion having substantially the same height as a road surface. A structure that is formed and an iron lid is attached to the receiving frame so as to be openable and closable is used. In this case, the lower main body and the upper main body are connected by screws so that the vertical position can be adjusted, and the upper end surface (iron cover receiving frame portion) of the upper main body at the time of burying construction is adjusted to be substantially the same height as the road surface, Alternatively, the structure is convenient for raising the upper main body when the iron case sinks due to road load or the like after installation. References disclosing such an iron housing (buried housing) include, for example,
No. 0-43537.

[0004]

In recent years, the iron case and the iron cover as described above have been designed to be quite tough, and will not be damaged by a small amount. However, if the vehicle is stepped on by a heavy vehicle traveling on the road surface, the movement of the lid and the receiving frame may cause wear over a long period of time, and if the wear is irregular, rattling may occur. , There is a risk that the lid will jump. This jumping of the lid may cause an unexpected accident. For this reason, it is necessary to make the cover (iron cover) not to jump even if the above-mentioned rattling occurs in the cover for the iron case. In addition, it is required that not only do not jump, but also that the lid can be easily opened and closed.

The present invention has been made in view of such technical problems, and an object of the present invention is to prevent a heavy vehicle from passing over an iron case without interfering with opening and closing operations of an iron cover. Can prevent the iron cover from jumping even when a large impact is applied, and even if the iron cover is rattling due to irregular wear due to long-term use, the iron cover will not jump off An object of the present invention is to provide a locking device for a lid for an iron housing, which can be easily implemented.

[0006]

According to a first aspect of the present invention, there is provided an iron for fitting an iron cover in a locked state to a receiving frame provided at an upper end of a structure buried underground. In the locking device for a housing lid portion, concave portions are formed at a plurality of positions on an inner peripheral surface of the iron cover fitting portion of the receiving frame portion, and locking projections are fitted into the concave holes at a plurality of positions on an outer peripheral surface of the iron lid. Forming a portion.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the structure is a hollow cylindrical upper main body provided with a receiving frame for fitting and supporting an iron lid at an upper end. A hollow cylindrical lower body supported on a bottom seat installed underground with an iron housing formed by screw engagement, wherein the concave hole and the locking projection are provided with the iron lid. The concave portion is disposed in a semicircular region on the opposite side of the position of the locking means for opening and closing the receiving frame portion, or the concave hole is used when rotating the upper body such as when raising the height. The above object can be achieved more efficiently by inserting a claw portion of a jig with a handle into the jig and also serving as a jig insertion concave hole for turning operation from the ground.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an iron case having a locking device for an iron case lid to which the present invention is applied, FIG. 2 is a longitudinal sectional view taken along line 2-2 in FIG. 1, and FIG. FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG. 1 to 3, a bottom seat 1 made of concrete or brick is buried in the vicinity of a device (not shown) such as a water control valve provided in the middle of a laying pipe for water, gas or electricity. A hollow cylindrical lower body 2 is provided on the bottom seat 1.
Is supported. The lower main body 2 forms a space for storing equipment such as a water control valve. Also, this lower body 2
(In the illustrated example, a female screw) 3 is formed in a range of a predetermined height from the upper end of the screw.

An upper body 4 is connected to the upper side of the lower body 2. The upper body 4 also has a substantially hollow cylindrical shape, and a screw (male screw in the illustrated example) 5 is formed at a connection portion thereof. Adjustably connected. The upper body 4
Has an upper end surface substantially at the same height as the road surface 6, and a receiving frame portion 7 is provided at the upper end portion. An iron cover (lid portion) 8 is fitted and supported on the receiving frame portion 7 so as to be openable and closable in a state where the iron cover 8 is substantially at the same height as the road surface 6. The iron cover 8 is connected to the receiving frame 7 at a part of its peripheral edge by means of a hinge means 9, and at the opposite side to the inner diameter of the receiving frame 7 by a locking means 10. It is detachably locked to the peripheral portion.

The hinge means 9 connects the receiving frame 9 and the iron cover 8 to both the connecting rod 1 and the connecting rod.
It has a structure that can be freely connected by 1. That is, the connecting rod 11 is inserted into the opening 13 of the shelf 12 formed inside the receiving frame 7 in a state where the connecting rod 11 is prevented from falling off by the retaining protrusion 14 formed at the lower end thereof. The iron cover 8 is connected to the iron cover 8 by guiding a pin portion 15 provided at an upper end thereof into a guide groove 16 formed in the iron cover 8. By such a hinge means 9, the iron lid 8 is connected to the receiving frame portion 7 so that it can be easily opened by lifting the opposite side with a jig such as a bar and turning the iron lid 8 laterally on the ground. I have.

FIG. 4 shows a state in which the iron cover 8 is closed and the locking means 10 is closed.
4 is a longitudinal sectional view showing a state in which the iron cover 8 is in a locking (locked) position along a line 4-4 in FIG. 1. FIG. 5 shows a state in which the iron cover 8 is still closed but the locking means 10 is a tool. FIG. 4 is a vertical sectional view taken along line 4-4 in FIG. 1 showing a state where the iron cover 8 is pressed to be in the unlocked position, and FIG. 6 is a plan view of the iron lid 8; 1 to 6, the locking means 10 has an opening (notch) 17 formed in a peripheral portion of the iron cover 8, and is rotatable around a fulcrum 18 provided on the back surface of the iron cover 8. When the swinging member 19 is attached and the iron cover 8 is closed, the lower end protrusion 20 is automatically engaged with the lower surface of the inner peripheral edge of the receiving frame 7 by the gravity of the swinging member 19 and locked. ) (FIGS. 2 and 4). On the other hand, when opening the iron lid 8, as shown in FIG. 5, the upper surface of the rocking member 19 is pressed (pressed down) with a tool such as a bur from the opening 17 so that the rocking member 19 is moved to the fulcrum 18 point. The lower end projection 20 is pivoted around to disengage (release the lock) from the inner peripheral edge of the receiving frame 7 so that the iron lid 8 can be lifted and opened.

At the plurality of positions on the inner peripheral surface 21 of the iron cover fitting of the receiving frame 7, there are formed concave holes 22 which are depressed radially outward, and at the plurality of positions of the outer peripheral surface 23 of the iron cover 8. Concave hole 2
2 is formed with a locking projection 24 that fits into the inside.
As shown in FIG. 1, the concave hole 22 and the locking projection 24 are formed on a semicircle opposite to the position of the locking means 10 for locking the iron lid 8 to the receiving frame 7 so as to be able to open and close. Are arranged in the area. In this embodiment, the locking projection 2
4 are formed in two places, and the concave holes 22 into which the locking projections 24 are fitted are also formed in two places.

In the present embodiment, similar concave holes 25 are formed at diametrically opposed positions of the two concave holes 22 respectively. The inner peripheral surface 21 of the receiving frame portion 7 fitted with the iron cover.
Are formed at four locations (in the example shown in the figure, at positions each having a circumferential angle of 90 degrees) and are recessed outward in the radial direction.
5 and 25 can be used as jig insertion concave holes for inserting the claw portion of the jig with the handle and rotating the jig with the handle when rotating the upper body 4 such as raising the height. I have. That is, the two concave holes 25 formed in the semicircular area on the same side as the position of the locking means 10 for locking the iron cover 8 to the frame portion 7 so as to be able to open and close are exclusively used for the jig insertion recess. Although used as a hole, two recessed holes 22 formed in a semicircular area on the opposite side from the position of the locking means 10 close the iron lid 8 by the fitting of the locking projection 24. The lock device is configured to be locked at the position, and can be used as a concave hole for inserting the jig. A document that discloses a jig with a handle suitable for use when rotating the upper body 4 at the time of raising the height is, for example, Japanese Patent Application Laid-Open No. Sho 60-43537 by the same applicant.

The opening 17 of the iron cover 8 has a T shape as shown in FIG. In order to open and close the iron cover 8, a bar-shaped opening / closing tool (not shown) having a locking portion projecting to both sides at the tip of the bar-shaped main body is generally used. 4 to 6, when opening the iron cover (iron housing cover portion) 8, the locking portion of the opening / closing tool is
The swing member 19 is inserted through the head 26 of the
Of the swing member 19 by pressing (pressing down) the upper surface of
By pivoting about 8, the swinging member is detached from the receiving frame 7 (unlocked) as shown in FIG. 5, and then the opening and closing tool is moved outward in the radial direction of the iron cover 8. By sliding the opening and closing tool, the locking portion of the opening / closing tool is locked on the back surfaces on both sides of the narrow portion 27 of the T-shaped opening 17, and the iron cover 8 is lifted in this state to be opened.

In this case, the concave hole 22 and the locking projection 24 are formed in a semicircular area on the opposite side from the position of the locking means 10 for locking the iron cover 8 to the receiving frame 7 so as to be able to open and close. And an appropriate play is provided at a fitting portion between the concave hole 22 and the locking protrusion 24. Further, the iron cover 8 is provided with the hinge number means 9 as a fulcrum. And the opposite side (the side of the locking means 10) is lifted, so that it becomes difficult to open the iron cover (iron housing cover) 8 due to the locking projection 24. Absent. For the same reason, it is not difficult to close the iron cover (iron housing cover) 8 due to the lock projection 24.

According to the above-described embodiment, in the locking device of the cover for the iron box, the iron cover 8 is fitted in a locked state to the receiving frame 7 provided at the upper end of the structure buried underground. A plurality of recesses 22 are formed at a plurality of positions on the inner peripheral surface 21 of the receiving frame 7 on which the iron cover is fitted, and locking projections 24 that fit into the recesses 22 at a plurality of positions on the outer peripheral surface 23 of the iron cover 8. Therefore, even when a heavy vehicle passes over the iron case and a large impact is applied, it is possible to prevent the iron cover 8 from jumping and open and close the iron cover 8 easily. Even if the iron cover is rattling due to irregular wear due to long-term use, the iron cover does not jump off and can be easily applied to existing iron cases. Is provided.

In the above embodiment, the case where the iron casing is formed by screwing the upper main body 4 and the lower main body 2 has been described as an example. The present invention can be similarly applied to a lid portion of an iron case formed by the above case, and the same effect can be achieved. Further, the present invention can be similarly applied to a case where the receiving frame portion or the iron cover of the iron case has a shape other than a circle (such as a square), and the same effect can be achieved. Furthermore, the present invention can be applied to any iron case, such as an iron case for a water control valve or an iron case for a manhole, regardless of the purpose and size of the iron case, and achieves the same effect. Can be done.

[0018]

As is apparent from the above description, according to the first aspect of the present invention, the iron case in which the iron cover is fitted in a locked state to the receiving frame provided at the upper end of the structure buried underground. In the locking device for a lid for use, a concave portion is formed at a plurality of positions on an inner peripheral surface of the receiving frame portion on which the iron cover is fitted, and a locking protrusion that fits into the concave hole at a plurality of positions on the outer peripheral surface of the iron cover. Because it is configured to form, without hindering the opening and closing operation of the iron lid, it is possible to prevent the iron lid from jumping even if a heavy impact acts as a heavy vehicle passes over the iron case, Even if the iron cover is rattling due to irregular wear due to long-term use, the iron cover does not jump off and can be easily applied to existing iron cases. Is provided.

According to the second to fourth aspects of the present invention, in addition to the configuration of the first aspect, the structure has a hollow cylindrical shape provided with a receiving frame portion for fittingly supporting an iron cover at an upper end portion. The upper body is configured as an iron case formed by screw engagement with a hollow cylindrical lower body supported on a bottom seat installed in the basement, the concave hole and the locking projection are formed as described above. A configuration in which the iron lid is openably and closably locked to the receiving frame portion in a semicircular region opposite to a position of the locking means, or the concave hole rotates the upper main body such as when raising the height. Since the claw portion of the jig with the handle is inserted and the hole is also used as a jig insertion concave hole for turning operation from the ground, the above-mentioned effect can be achieved more efficiently. .

[Brief description of the drawings]

FIG. 1 is a plan view of an iron housing having a locking device for an iron housing lid to which the present invention is applied.

FIG. 2 is a longitudinal sectional view taken along line 2-2 in FIG.

FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG.

FIG. 4 is a longitudinal sectional view showing a state in which the iron cover is closed and the locking means is in a locking position along a line 4-4 in FIG. 1;

FIG. 5 shows a state in which the iron cover is still closed but the locking means is pressed by a tool to be in the unlocked position as indicated by line 4 in FIG.
It is a longitudinal cross-sectional view shown along -4.

FIG. 6 is a plan view of the iron cover shown in FIGS. 1 to 5;

[Explanation of symbols]

 2 Lower body 4 Upper body 6 Road surface 7 Receiving frame 8 Iron lid (Iron housing lid) 9 Hook number means 10 Locking means 11 Connecting rod 17 Opening (T-shaped opening) 18 Support point 19 Swinging member 20 Lower end projection Part 21 Inner peripheral surface of iron lid fitting 22 Concave hole 23 Outer peripheral surface of iron lid 24 Lock projection 25 Concave hole

Claims (4)

[Claims] 1. A locking device for an iron housing lid, wherein an iron lid is fitted in a locked state to a receiving frame provided at an upper end of a structure buried underground. A locking device for a lid for an iron housing, wherein concave holes are formed at a plurality of positions on an inner peripheral surface, and locking projections fitted into the concave holes are formed at a plurality of positions on an outer peripheral surface of the iron cover. 2. The structure according to claim 1, further comprising: a hollow cylindrical upper main body provided with a receiving frame for fitting and supporting an iron lid at an upper end.
The lock of the lid for an iron case according to claim 1, wherein the iron case is formed by screwing engagement with a hollow cylindrical lower main body supported on a bottom seat installed in the basement. apparatus. 3. The method according to claim 1, wherein the concave hole and the locking protrusion are
3. The iron casing according to claim 1, wherein the iron cover is disposed in a semicircular region on a side opposite to a position of a locking unit that locks the opening and closing on the receiving frame portion. 4. Locking device for lid. 4. The concave hole also serves as a jig inserting concave hole for inserting a claw portion of a jig with a handle and rotating the jig with a handle when rotating the upper main body such as raising the height. The locking device for an iron housing lid according to claim 2 or 3, wherein